diff -u b/core/misc/ajax.js b/core/misc/ajax.js
--- b/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -959,7 +959,7 @@
     $(this.element).prop('disabled', false);
     // Reattach behaviors, if they were detached in beforeSerialize(), and the
     // form is still part of the document.
-     if (this.$form && $.contains(document, this.$form.get(0))) {
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       var settings = this.settings || drupalSettings;
       Drupal.attachBehaviors(this.$form.get(0), settings);
     }
diff -u b/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php b/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php
--- b/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php
+++ b/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php
@@ -73,7 +73,8 @@
     $create_new_filter_group->click();
     $assert_session->assertWaitOnAjaxRequest();
 
-    // Validate dragging to an invalid location doesn't work.
+    // Validate dragging works correctly and the new group will contain the new
+    // filter.
     $dragged = $page->find('css', ".tabledrag-handle");
     $target = $page->find('css', '.filter-group-operator-row');
     $dragged->dragTo($target);